Hacking Help/snes on gba

[darthreaper]

What do you need to play Snes games in my nintendo ds?I have the supercard/superkey.Do I need something else,and where do I get the emu/roms for snes.Also I am still having problems with GBA games on my super card.I could save them on my sd card,but when I load them the screen turns white after the GBA logo appears.But,the funny thing is that I havae 2 GBA that works X-men and contra advance....please help! .............................Also what is the best product for gba and snes emulation and roms?